While sunk costs may be considered fixed costs, not all fixed costs are considered sunk. For instance, a fixed cost isn't sunk if a piece of machinery that a company purchases can be sold to someone else for the original purchase price. For example, let's say that Company ABC has a lease of $10,000 a month on its production facility and produces 1,000 mugs per month. If it produces 10,000 mugs a month,...